Knowledge (XXG)

Stokes mortar

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In the last quarter of 1915, 304 Stokes mortars were produced. Only 104 of these reached the front, however, the remainder being sent to training schools. The subcontracting-out of manufacture of the mortar mounting was undertaken in February 1916. In March 1916, it was announced the light trench
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Range was determined by the amount of propellant charge used and the angle of the barrel. A basic propellant cartridge was used for all firing, and covered short ranges. Up to four additional "rings" of propellant were used for incrementally greater ranges. The four rings were supplied with the
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The barrel is a seamless drawn-steel tube necked down at the breech or base end. To the breech end is fitted a base cap, within which is secured a firing pin protruding into the barrel. The caps at each end of the bomb cylinder were 81 mm diameter. The bomb was fitted with a modified
403:. With the many changes to battlefield doctrine during the First World War, the concept gained interest again. At first the British and French resorted to re-issuing these ancient mortars; after modernized designs became available, the Stokes mortar in particular gained popularity. 38: 601: 386:
One potential problem was the recoil, which was "exceptionally severe, because the barrel is only about 3 times the weight of the projectile, instead of about one hundred times the weight as in artillery. Unless the legs are properly set up they are liable to injury".
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In World War I, the Stokes mortar could fire as many as 25 bombs per minute and had a maximum range of 800 yards (732 m) firing the original cylindrical un-stabilised projectile. British Empire units had 1,636 Stokes mortars in service on the
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in the base of the bomb would make contact with a firing pin at the base of the tube, and ignite the propellant charge in the base, launching the bomb towards the target. The warhead itself was detonated by an impact fuse on reaching the target.
748:, B: "45° gave maximum range with any particular propellant amount e.g. 420 yards with 1 ring. 75° gave the most vertical descent for the shell and the shortest range with any particular propellant amount e.g. 197 yards with 1 ring." 466:; this design was widely copied with and without license. Despite their indigenous production, out of 8,000 81 mm mortars in service with the French in 1939, 2,000 were of the original Mk. I build purchased from Great Britain. 497:(incendiary) rounds. A quantity of just under thirty were used at the Battle of Loos in September 1915. Up to the end of 1918, a total of 1,123 were manufactured. This, used solely by the Special Brigade of the 501:, should be considered a separate weapon from the standard "3-inch" version used by the infantry — with an actual bore of 3.2 inches (81 mm) — firing high explosive rounds described in this article. 433:
mortars would be controlled by Infantry Brigades. The handbook for the Stokes trench mortar was issued to the infantry in April 1916. In total, 11,331 3-inch Stokes mortars were manufactured in Britain.
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Frederick Wilfred Scott Stokes – who later became Sir Wilfred Stokes KBE – designed the mortar in January 1915. The British Army was at the time trying to develop a weapon that would be a match for the
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A modified version of the mortar, which fired a modern fin-stabilised streamlined projectile and had a booster charge for longer range, was developed after World War I; this was in effect a new weapon.
583: 544:. In September 1936, 44,000 Stokes rounds arrived in Spain. By World War II, it could fire as many as 30 bombs per minute and had a range of over 2,500 yd (2,286 m) with some shell types. 2209: 825:
Forty ancient Coehorn mortars, firing spherical ammunition using black powder charges,were obtained from the French, and were actually fired at the battles at Neuve Chapelle and Aubers Ridge.
1260: 347:. The 3-inch trench mortar is a smooth-bore, muzzle-loading weapon for high angles of fire. Although it is called a 3-inch mortar, its bore is actually 3.2 inches or 81 mm. 2219: 1404: 2214: 2204: 1700: 1761: 713:"Appendix D. Details of Trench Mortars" in "Field Artillery Notes No. 7". Mortar=48 lb; Elevating Stand=28 lb; Base Plate=28 lb; Total Weight for Transport = 104 lbs 998: 2199: 429:) and Lieutenant-Colonel J. C. Matheson of the Trench Warfare Supply Department (who reported to Lloyd George) to expedite manufacture of the Stokes mortar. 1253: 421:
Stokes's design was initially rejected in June 1915 because it was unable to use existing stocks of British mortar ammunition. It took the intervention of
1361: 669: 2229: 1246: 722:"Appendix E. Details of Ammunition" in "Field Artillery Notes No. 7". This figure is for the unstabilised cylindrical bomb used in World War I. 1693: 1169: 955: 916: 541: 1199: 1121: 2044: 2140: 1924: 1914: 1898: 1848: 1232: 1097: 2130: 1868: 1819: 987:, Ministry of Munitions, Munitions Council: Historical Records Branch, MUN 5/195/1600 – via The National Archives UK reading room 1147: 1201:
A MUSE OF FIRE; British Trench Warfare Munitions, their Invention, Manufacture and Tactical Employment on the Western Front, 1914–18
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Light mortars portable by one man had already been in use centuries earlier, but had fallen out of general usage since the
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on the front, with a perforated tube containing a propellant charge and an impact-sensitive cap at the rear.
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War Dept. Technical Manual TM9-2005, Volume 3, Ordnance Materiel - General, Page 17, December 1942
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This article is about the World War I Stokes 3-inch mortar. For the World War II mortar, see
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Range Table For 3-Inch Stokes Mortar (Report). United Kingdom War Office. September 1917.
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with example of his mortar and bombs. Typical 3-inch bombs used are 2nd and 6th from left
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for inventing the modern mortar, and was given several forms of monetary reward by the
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It remained in service into the Second World War, when it was superseded by the
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soldiers loading a Stokes mortar, on the Western Front during World War I.
1235:. United States War Department, 1932. via Combined Arms Research Library] 1122:"Stokes' trench howitzer, 3", mark I". US Army War College, January 1918. 494: 363:
mount. When a mortar bomb was dropped into the tube, an impact sensitive
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An example with bombs is displayed at l'hotel de ville d'Arras, France.
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A 4-inch (102 mm) version was used to fire smoke, poison gas, and
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metal tube fixed to a base plate (to absorb recoil) with a lightweight
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Armas para España: la historia no contada de la Guerra Civil Española
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The French developed an improved version of the Stokes mortar as the
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Boselli Cantero, Cristina and Casabianca, Angel-Francois (2000).
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cartridge and gunners discarded the rings that were not needed.
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Una guerra desconocida: la campaña del Chaco Boreal, 1932–1935
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Field Artillery Notes No. 7. US Army War College August 1917.
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Published by His Majesty's Stationery Office, London, 1920.
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and placed on a telegraph pole for collection and disposal
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in September 1932. Stokes mortars were widely used by the
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The Stokes mortar was a simple weapon, consisting of a
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http://blog.awm.gov.au/awm/2008/04/01/trench-mortar/
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Report on work of Trench Warfare Supplies Department
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World War II infantry mortars of the United Kingdom
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Mortero Stokes Brandt de 81mm- El mortero del Chaco
520:made extensive use of the Stokes mortar during the 306: 296: 288: 280: 268: 258: 248: 238: 223: 210: 202: 197: 189: 176: 171: 140: 74: 69: 61: 51: 28: 1014:"Surviving 4-in. Stokes trench mortar at Rovereto" 594:fusing Stokes shells near Wieltje, 1 October 1917 1762:1.59-inch breech-loading Vickers Q.F. gun, Mk II 1045:– via Passion & Compassion 1914-1918. 1023:– via Passion & Compassion 1914-1918. 807: 805: 1694: 1254: 8: 1140:U.S. Infantry Weapons of the First World War 911:. Sterling Publishing Company. p. 202. 997:: CS1 maint: numeric names: authors list ( 908:The Encyclopedia of Weapons of World War II 894:(Supplement). 24 August 1917. p. 8795. 787:Stokes's Trench Howitzer 3" Mark I, page 15 2220:World War II infantry weapons of Australia 1701: 1687: 1679: 1261: 1247: 1239: 1036:"Surviving Stokes mortar at Les Invalides" 36: 25: 2215:World War I infantry weapons of Australia 2205:World War I mortars of the United Kingdom 767:Range Table For 3-Inch Stokes Mortar 1917 746:Range Table For 3-Inch Stokes Mortar 1917 970: 872: 860: 848: 836: 607:An intact Stokes shell found during the 1441:Nos. 3, 20, 24, 35 Hales rifle grenades 1300:Short Magazine Lee–Enfield (SMLE) rifle 657: 551: 990: 1362:Pattern 1897 infantry officer's sword 1034:Jalabert, Jean-Luc (14 August 2008). 686: 684: 682: 647: : approximate German equivalent 7: 2200:World War I British infantry weapons 2045:Livens Large Gallery Flame Projector 665: 663: 661: 1098:Bernard Plumier : his web page 1012:Plumier, Bernard (20 August 2008). 796: 694:. Volumes 4 and 5. Lector, p. 176. 1130:via Combined Arms Research Library 1124:via Combined Arms Research Library 1057:"The Sandino Rebellion, 1927-1934" 823:– via The long, long trail. 508:and helped American forces defeat 504:The Stokes mortar was used in the 14: 626:Australian War Memorial, Canberra 1295:Magazine Lee-Enfield (MLE) rifle 948:Infantry Mortars of World War II 600: 582: 568: 554: 414:mortar, which was in use on the 343:, during the latter half of the 281:Effective firing range 2141:BL 9.2-inch Mk IX – X naval gun 1899:BL 8-inch howitzer Mk VI – VIII 1329:Webley .455" Revolver Mk. IV–VI 127:Commonwealth of the Philippines 2230:Weapons of the Philippine Army 2131:QF 4-inch naval gun Mk I – III 1344:Smith & Wesson Triple Lock 1136:"The Three Inch Stokes Mortar" 479:Portuguese Expeditionary Corps 341:Portuguese Expeditionary Corps 289:Maximum firing range 1: 1978:QF 3.7-inch mountain howitzer 812:Baker, Chris (24 July 2015). 2068:QF 2-pounder "pom-pom" Mk II 1915:BL 7.5-inch Mk III naval gun 2174:BL 12-inch railway howitzer 1894:BL 8-inch howitzer Mk I – V 1207:(PhD). University of Exeter 1134:Canfield, Bruce N. (2000). 1077:. Península, Madrid, p. 394 514:Second Battle of Las Cruces 2246: 2136:BL 6-inch Mk VII naval gun 2030:Smoke and chemical weapons 1963:BL 10-pounder mountain gun 1925:BL 9.2-inch Mk X naval gun 1372:Pattern 1908 cavalry sword 1198:Saunders, Anthony (2008). 983:The 4-inch Stokes mortar, 15: 1973:QF 2.95-inch mountain gun 1968:BL 2.75-inch mountain gun 1958:RML 2.5-inch mountain gun 1935:BL 12-inch Mk X naval gun 1889:BL 6-inch 30 cwt howitzer 1884:BL 6-inch 26 cwt howitzer 1334:Webley .455" Pistol Mk. I 462:, further refined as the 438:Ordnance ML 3 inch mortar 218: 62:Place of origin 35: 18:Ordnance ML 3 inch mortar 2006:Vickers 1.57-inch mortar 1602:Vickers 1.57-inch mortar 1061:www.sandinorebellion.com 640:List of infantry mortars 276:6-8 rpm (sustained) 206:104 lbs (47.17 kg) total 2164:BL 9.2-inch railway gun 576:No. 145 percussion fuze 516:on 1 January 1928. The 331:that was issued to the 2179:BL 14-inch railway gun 2169:BL 12-inch railway gun 2021:9.45-inch Heavy Mortar 1739:QF 6-pounder Hotchkiss 1142:. Andrew Mowbray Pub. 482: 409:Imperial German Army's 270:Rate of fire 117:Second Polish Republic 1996:Garland trench mortar 1635:Leach trench catapult 1612:Garland trench mortar 1162:Western Front 1914–18 905:Chris Bishop (2002). 542:sold mostly by Poland 477: 453:Ministry of Munitions 427:Minister of Munitions 274:25 rpm (maximum) 92:French Third Republic 30:3 inch Stokes mortar 2126:QF 12-pounder 12 cwt 2078:QF 12-pounder 12 cwt 2063:QF 1-pounder pom-pom 2036:4-inch Stokes Mortar 2016:Newton 6-inch mortar 2011:2-inch medium mortar 2001:3-inch Stokes mortar 1920:BL 9.2-inch howitzer 1879:BL 6-inch gun Mk XIX 1874:BL 6-inch gun Mk VII 1869:BLC 6-inch siege gun 1859:BL 5.4-inch howitzer 1830:QF 4.5-inch howitzer 1825:BL 4-inch gun Mk VII 1820:QF 4-inch gun Mk III 1790:QF 12-pounder 18 cwt 1734:QF 3-pounder Vickers 1617:3-inch Stokes mortar 1607:2-inch medium mortar 1563:No. 32 "Spherical E" 1377:Pattern 1913 bayonet 1367:Pattern 1907 bayonet 1305:Pattern 1914 Enfield 946:John Norris (2002). 2093:QF 13-pounder 9 cwt 2088:QF 13-pounder Mk IV 2083:QF 13-pounder 6 cwt 1940:BL 15-inch howitzer 1930:BL 12-inch howitzer 1785:QF 12-pounder 8 cwt 1780:BL 12-pounder 6 cwt 1558:No. 32 Night Signal 1400:Vickers machine gun 1181:"The Stokes Mortar" 1073:Howson, G. (2000). 645:7.58 cm Minenwerfer 562:High explosive bomb 307:Filling weight 2055:Anti-aircraft guns 1950:Mountain artillery 1854:BL 5-inch howitzer 1744:QF 6-pounder 6 cwt 1517:No. 21 "Spherical" 1272:small arms of the 891:The London Gazette 621:Surviving examples 530:Battle of Boquerón 524:, especially as a 512:rebels during the 490:at the Armistice. 483: 447:Stokes received a 423:David Lloyd George 326:Sir Wilfred Stokes 181:Sir Wilfred Stokes 172:Production history 2187: 2186: 2118:Coastal artillery 1864:BL 60-pounder gun 1676: 1675: 1627:Grenade launchers 1553:No. 31 Day Signal 1171:978-1-870114-00-4 957:978-1-84176-414-6 918:978-1-58663-762-0 538:Spanish Civil War 339:, as well as the 314: 313: 292:800 yards (731 m) 284:750 yards (686 m) 97:Kingdom of Greece 2237: 2098:QF 3-inch 20 cwt 2040:Livens Projector 1725:Armoured vehicle 1703: 1696: 1689: 1680: 1405:Hotchkiss Mark I 1339:Colt New Service 1263: 1256: 1249: 1240: 1216: 1214: 1212: 1206: 1194: 1189:. 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mm) 242: 236: 235: 227: 221: 220: 216: 215: 212: 208: 207: 204: 200: 199: 198:Specifications 195: 194: 191: 187: 186: 178: 174: 173: 169: 168: 166: 165: 160: 155: 150: 144: 142: 138: 137: 135: 134: 129: 124: 119: 114: 109: 104: 99: 94: 89: 84: 82:British Empire 78: 76: 72: 71: 67: 66: 65:United Kingdom 63: 59: 58: 53: 49: 48: 44:Wilfred Stokes 41: 33: 32: 22: 13: 10: 9: 6: 4: 3: 2: 2242: 2231: 2228: 2226: 2223: 2221: 2218: 2216: 2213: 2211: 2208: 2206: 2203: 2201: 2198: 2197: 2195: 2180: 2177: 2175: 2172: 2170: 2167: 2165: 2162: 2161: 2159: 2157: 2153: 2147: 2144: 2142: 2139: 2137: 2134: 2132: 2129: 2127: 2124: 2123: 2121: 2119: 2115: 2109: 2106: 2104: 2103:QF 18-pounder 2101: 2099: 2096: 2094: 2091: 2089: 2086: 2084: 2081: 2079: 2076: 2074: 2071: 2069: 2066: 2064: 2061: 2060: 2058: 2056: 2052: 2046: 2043: 2041: 2038: 2035: 2034: 2032: 2028: 2022: 2019: 2017: 2014: 2012: 2009: 2007: 2004: 2002: 1999: 1997: 1994: 1993: 1991: 1989: 1985: 1979: 1976: 1974: 1971: 1969: 1966: 1964: 1961: 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1539: 1536: 1534: 1533: 1528: 1526: 1525: 1524:Newton-Pippin 1520: 1518: 1515: 1513: 1510: 1508: 1505: 1503: 1502: 1497: 1495: 1494: 1489: 1487: 1486: 1481: 1479: 1478: 1473: 1471: 1470: 1465: 1463: 1462: 1457: 1455: 1452: 1450: 1449: 1444: 1442: 1439: 1437: 1436: 1435:Hales Pattern 1431: 1429: 1426: 1425: 1423: 1421: 1420:Hand grenades 1417: 1411: 1408: 1406: 1403: 1401: 1398: 1396: 1393: 1392: 1390: 1388: 1384: 1378: 1375: 1373: 1370: 1368: 1365: 1363: 1360: 1359: 1357: 1355: 1354:Edged weapons 1351: 1345: 1342: 1340: 1337: 1335: 1332: 1330: 1327: 1326: 1324: 1322: 1318: 1312: 1309: 1306: 1303: 1301: 1298: 1296: 1293: 1291: 1288: 1287: 1285: 1283: 1279: 1275: 1271: 1264: 1259: 1257: 1252: 1250: 1245: 1244: 1241: 1234: 1231: 1228: 1225: 1224: 1220: 1203: 1202: 1196: 1192: 1188: 1187: 1182: 1177: 1173: 1167: 1163: 1159: 1155: 1151: 1145: 1141: 1137: 1132: 1129: 1126: 1123: 1120: 1115: 1114: 1110: 1103: 1099: 1094: 1091: 1088: 1083: 1080: 1076: 1070: 1067: 1062: 1058: 1052: 1049: 1037: 1030: 1027: 1015: 1008: 1005: 1000: 994: 986: 979: 976: 972: 971:Farndale 1986 967: 964: 959: 953: 949: 942: 939: 934: 928: 925: 920: 914: 910: 909: 901: 898: 893: 892: 887: 881: 878: 874: 873:Saunders 2008 869: 866: 862: 861:Saunders 2008 857: 854: 850: 849:Saunders 2008 845: 842: 838: 837:Saunders 2008 833: 830: 826: 815: 808: 806: 802: 798: 793: 790: 784: 781: 775: 772: 768: 763: 760: 754: 751: 747: 742: 739: 733: 731: 729: 725: 719: 716: 710: 707: 701: 700:99925-51-91-7 697: 693: 687: 685: 683: 679: 673: 672: 666: 664: 662: 658: 651: 646: 643: 641: 638: 637: 633: 628: 625: 624: 620: 614: 611:in 2004 near 610: 603: 598: 593: 585: 580: 571: 566: 557: 552: 548:Image gallery 547: 545: 543: 539: 535: 531: 527: 523: 519: 515: 511: 507: 502: 500: 496: 491: 489: 488:Western Front 480: 476: 469: 467: 465: 464:Brandt Mle 31 461: 460:Brandt Mle 27 456: 454: 450: 445: 443: 439: 434: 430: 428: 424: 419: 417: 416:Western Front 413: 410: 404: 402: 394: 392: 388: 384: 380: 378: 375: 369: 366: 362: 358: 350: 348: 346: 342: 338: 334: 330: 327: 323: 322:trench mortar 319: 318:Stokes mortar 309: 305: 302: 299: 295: 291: 287: 283: 279: 273: 271: 267: 263: 261: 257: 253: 251: 247: 243: 241: 237: 231: 228: 226: 222: 217: 213: 209: 205: 201: 196: 192: 188: 185: 182: 179: 175: 170: 164: 161: 159: 156: 154: 151: 149: 146: 145: 143: 139: 133: 132:United States 130: 128: 125: 123: 120: 118: 115: 113: 110: 108: 105: 103: 100: 98: 95: 93: 90: 88: 85: 83: 80: 79: 77: 73: 68: 64: 60: 57: 54: 50: 45: 39: 34: 27: 19: 2225:81mm mortars 2156:Railway guns 2073:75 mm AA gun 2000: 1663:.303 British 1616: 1582: 1569: 1531: 1523: 1500: 1492: 1484: 1476: 1468: 1460: 1447: 1434: 1387:Machine guns 1209:. Retrieved 1200: 1191:the original 1185: 1161: 1158:Farndale, M. 1139: 1111:Bibliography 1093: 1082: 1074: 1069: 1060: 1051: 1039:. Retrieved 1029: 1017:. Retrieved 1007: 984: 978: 966: 947: 941: 927: 907: 900: 889: 880: 868: 856: 844: 832: 824: 817:. Retrieved 792: 783: 774: 762: 753: 741: 718: 709: 703:(in Spanish) 691: 675:(in Spanish) 670: 609:iron harvest 526:siege weapon 503: 492: 484: 457: 446: 435: 431: 420: 405: 398: 389: 385: 381: 374:hand grenade 370: 354: 324:designed by 317: 315: 153:World War II 75:Used by 56:Light mortar 23:Light mortar 1668:.455 Webley 1290:Lee–Metford 1211:27 February 1041:26 February 886:"No. 30250" 819:26 February 590:Men of the 536:during the 506:Banana Wars 412:Minenwerfer 337:U.S. armies 232:10 lb 11 oz 158:Banana Wars 148:World War I 112:Netherlands 2194:Categories 2146:RML 9-inch 1655:Cartridges 1645:Sauterelle 1548:No. 29 Gas 1459:Nos. 8, 9 1311:Ross Rifle 1186:The Mortar 1102:photograph 510:Sandinista 470:Combat use 449:knighthood 357:smoothbore 1713:artillery 1501:Opera hat 1410:Lewis gun 1395:Maxim gun 522:Chaco War 260:Elevation 234:(4.84 kg) 163:Chaco War 1532:Sangster 1321:Sidearms 1160:(1986). 993:citation 634:See also 495:thermite 190:Designed 177:Designer 122:Portugal 107:Paraguay 1988:Mortars 1715:of the 1594:Mortars 1581:No. 39 1568:No. 34 1530:No. 25 1522:No. 22 1499:No. 17 1491:No. 16 1483:No. 15 1477:Pitcher 1475:No. 14 1467:No. 13 1461:Jam Tin 1019:1 March 797:Ruffell 528:in the 395:History 333:British 297:Filling 264:45°-75° 240:Calibre 87:Belgium 1576:No. 37 1538:No. 27 1512:No. 19 1507:No. 18 1469:Battye 1433:No. 2 1282:Rifles 1168:  1146:  954:  915:  698:  365:primer 351:Design 301:amatol 250:Action 1454:No. 6 1448:Mills 1428:No. 1 1307:rifle 1205:(PDF) 652:Notes 613:Ypres 592:KOYLI 361:bipod 225:Shell 1727:guns 1493:Oval 1485:Ball 1213:2023 1166:ISBN 1144:ISBN 1043:2023 1021:2023 999:link 952:ISBN 913:ISBN 821:2023 696:ISBN 377:fuse 335:and 316:The 254:Trip 211:Crew 203:Mass 193:1915 141:Wars 52:Type 42:Sir 1570:Egg 329:KBE 184:KBE 2196:: 1183:. 1138:. 1100:, 1059:. 995:}} 991:{{ 888:. 804:^ 727:^ 681:^ 660:^ 540:, 455:. 444:. 418:. 230:HE 1702:e 1695:t 1688:v 1262:e 1255:t 1248:v 1215:. 1174:. 1152:. 1063:. 1001:) 960:. 935:. 921:. 799:. 214:2 20:.

Index

Ordnance ML 3 inch mortar

Wilfred Stokes
Light mortar
British Empire
Belgium
French Third Republic
Kingdom of Greece
Kingdom of Italy
Paraguay
Netherlands
Second Polish Republic
Portugal
Commonwealth of the Philippines
United States
World War I
World War II
Banana Wars
Chaco War
Sir Wilfred Stokes
KBE
Shell
HE
Calibre
Action
Elevation
Rate of fire
amatol
trench mortar
Sir Wilfred Stokes

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